The study was conducted by the CDC to plan for STD and HIV treatment, since over half of STD infections occur in kids between the ages of fifteen and twenty four. But the study also has interesting implications about how we see sexuality — teenage and otherwise — in this country. Is this a sign that abstinence-only education, the lack of teenage sex in high-school movies, and an overall cultural shift have really kept kids from having sex? If so, is that a good thing? The survey doesn't give any direct data that suggest that teen pregnancy or STD-transmission have similarly decreased, but last I heard, they haven't.